{"product_id":"time-mark-corp-258b-240vac-three-phase-monitor","title":"Time Mark Corp. 258B-240VAC Three-Phase Monitor","description":"\u003ch3 data-section-id=\"17lc1ru\" data-start=\"0\" data-end=\"16\"\u003eDescription:\u003c\/h3\u003e\n\u003cp data-start=\"17\" data-end=\"693\"\u003eThe Time Mark Corporation 258B-240VAC 3-Phase Monitor is designed to continuously monitor 208–240 VAC three-phase power systems for phase loss, phase reversal, and undervoltage conditions to protect motors and industrial equipment from damaging power abnormalities. Commonly installed in motor control centers, HVAC systems, pumps, compressors, conveyors, and manufacturing machinery where dependable three-phase power monitoring is required. Maintenance teams, OEMs, and system integrators use the 258B-240VAC for replacement, repair, retrofit, and preventive maintenance to improve equipment reliability and minimize unplanned downtime. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5ms9th\" data-start=\"695\" data-end=\"712\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"713\" data-end=\"1321\"\u003eThe Time Mark 258B-240VAC is a solid-state three-phase monitoring relay that continuously supervises Wye or Delta power systems without requiring a neutral connection and automatically de-energizes its output relay whenever phase loss, phase reversal, or undervoltage conditions are detected. It is widely used in industrial automation systems, motor control panels, HVAC equipment, water and wastewater facilities, compressors, conveyors, and other process machinery where reliable three-phase voltage monitoring helps prevent motor damage and production interruptions. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5hg6bl\" data-start=\"1323\" data-end=\"1352\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"1353\" data-end=\"2313\"\u003e• Manufacturer: Time Mark Corporation\u003cbr data-start=\"1390\" data-end=\"1393\"\u003e• Manufacturer Part Number (MPN): 258B-240VAC\u003cbr data-start=\"1438\" data-end=\"1441\"\u003e• Product Type: 3-Phase Power Monitor Relay\u003cbr data-start=\"1484\" data-end=\"1487\"\u003e• Series: 258 Series\u003cbr data-start=\"1507\" data-end=\"1510\"\u003e• Nominal Voltage: 208–240 VAC (Phase-to-Phase)\u003cbr data-start=\"1557\" data-end=\"1560\"\u003e• Voltage Adjustment Range: 160–240 VAC\u003cbr data-start=\"1599\" data-end=\"1602\"\u003e• Frequency: 60 Hz\u003cbr data-start=\"1620\" data-end=\"1623\"\u003e• Monitoring Functions: Phase Loss, Phase Reversal, Undervoltage Protection\u003cbr data-start=\"1698\" data-end=\"1701\" data-is-only-node=\"\"\u003e• Output Contacts: SPDT, 10 A at 240 VAC Resistive\u003cbr data-start=\"1751\" data-end=\"1754\"\u003e• Power Consumption: 2.4 W\u003cbr data-start=\"1780\" data-end=\"1783\"\u003e• Response Time: 50 ms Dropout\u003cbr data-start=\"1813\" data-end=\"1816\"\u003e• Repeat Accuracy: ±0.1% of Set Point\u003cbr data-start=\"1853\" data-end=\"1856\"\u003e• Dead Band: Approximately 2%\u003cbr data-start=\"1885\" data-end=\"1888\"\u003e• Reset: Automatic\u003cbr data-start=\"1906\" data-end=\"1909\"\u003e• Mounting: 8-Pin Plug-In Socket\u003cbr data-start=\"1941\" data-end=\"1944\"\u003e• Indicators: TRIP and NORM LEDs\u003cbr data-start=\"1976\" data-end=\"1979\"\u003e• Wye\/Delta Compatible: Yes (No Neutral Required)\u003cbr data-start=\"2028\" data-end=\"2031\"\u003e• Certifications: UL Recognized, CSA Certified\u003cbr data-start=\"2077\" data-end=\"2080\"\u003e• Operating Temperature: -20°F to +131°F (-29°C to +55°C)\u003cbr data-start=\"2137\" data-end=\"2140\"\u003e• Application: Three-phase motor protection, industrial automation, HVAC systems, pumps, compressors, conveyors, and process equipment. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"1cz0398\" data-start=\"2315\" data-end=\"2339\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"2340\" data-end=\"2418\"\u003e• Time Mark 258BM-240VAC\u003cbr data-start=\"2364\" data-end=\"2367\"\u003e• Time Mark A258B-480VAC\u003cbr data-start=\"2391\" data-end=\"2394\"\u003e• Time Mark B258B-120VAC\u003c\/p\u003e","brand":"Time","offers":[{"title":"New","offer_id":51714028699950,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_c1d186e2-4b5f-4fd3-94d8-be566d31dce8.jpg?v=1770414249","url":"https:\/\/plgautomation.com\/products\/time-mark-corp-258b-240vac-three-phase-monitor","provider":"PLG Automation ","version":"1.0","type":"link"}